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POLinked List in C (apparently malloc doesn't want to be my friend)
 

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    <p>I was so pleased with myself getting this to work last night without any errors or warnings on my first try too! But, of course, I changed a bunch of stuffed and screwed it up... When I tried to gdb it, the list from this.ytxt seemed load to memory just fine. I think the problem was writing it. Now. it works again but only writes the first line of the file. I commented out whole functions and printf'd test marks and still couldn't figure it out. the idea is to read a variable number of lines from a file and print them in pairs. (Actually it was meant to be like study flashcards but I never got around to that part)</p> <pre><code>#include &lt;stdio.h&gt; #include &lt;stdlib.h&gt; #include &lt;string.h&gt; struct member{ //This emulates a dictionary char key[20]; //and links each word+definition pair to the next pair. char def[20]; struct member *ptr; }; struct member *root; struct member *curr; FILE *f; int fill_list(){ //Fill each member struct with next two lines of curr=root; char this[20]; //FILE *f while(EOF){ if(!fgets(this,20,f)) break; strcpy(curr-&gt;key,this); if(!fgets(this,20,f)) break; strcpy(curr-&gt;def,this); curr=curr-&gt;ptr; curr=malloc(sizeof(struct member)); curr-&gt;ptr=0; } return 0; } void free_all(){ curr=NULL; while(curr!=root){ curr=root; while(curr-&gt;ptr)curr=curr-&gt;ptr; free(curr); } } int terminate(int i){ //The terminate function closes file and free_all(); //frees malloc'd memory, then returns main func's fclose(f); //return value. return i; } int main(){ f=fopen("this.txt","r"); if(!f)return -1; root=malloc(sizeof(struct member)); root-&gt;ptr=NULL; fill_list(); curr=root; if ( curr != 0 ) { while ( curr != 0 ) { printf( "%s", curr-&gt;key ); curr = curr-&gt;ptr; } } free_all(); return terminate(0); } </code></pre>
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